>> where vbd=768+(n<<6) does not hold on EC2. This guy says the block ID is 256 * the major block device number plus the minor device number (http://www.tldp.org/HOWTO/Partition/devices.html).
http://lists.xen.org/archives/html/xen-users/2011-01/msg00262.html Quote: You got the following block IDs (you can derive these from 256*major number + minor number): sda -> 2048 sda2 -> 2050 sda3 -> 2051 sdb -> 2064
